Electrically actuated valve



Jan. 2?, 1948.. c. I. HALL v 2,435,076

ELECTRICALLJY ACTUATED VALVE Filed April 25, 1944 Inverator": Chester'-I. all,

Hfg At-tor'ngg.

PatentetlT-J'an; 27, 1948 ELECTRICALLY ACTUATED VALVE Chester 1. Hall,Vischers Ferry, N. Y., assignor to General Electric Company, acorporation of New York Application April 25, 1944, Serial No. 532,677

4 Claims. (Cl. 137-139) My invention relates to electrically actuatedvalves, more particularly toelectromagnetically operated'bvalves, andhas for its object a simple, reliable and compact-electrically actuatedtwoway valve having two relatively large and small apertures which areselectivelyopened and closed.

My, inventionis especially useful in automatic resuscitator devicessuch'as'described and claimed in: acopending patent application SerialNo. 489,045, filed by-ArthurJ. Kizaur on May 29, 1948, now Patent No.2,418,034, for Respiration apparatus; assigned to the same assignee asthis invention.

In carryingoutmy invention in one form I provide walls'forming acircular/chamber provided with oppositely disposed large and smallopenings, together with an operating electromagnet mounted in thelargeopening and operating a diaphragmtvalve member to selectively op'enand close the openings. I

For a .more complete understanding of my invention, reference should behad to the accompanying drawing, Fig. 1 of which is a plan view ofa.valve embodying'myinvention; Fig. 2 is a sec-' tional'viewtakenalongthe line 2-2 of Fig. 1 looking in the direction of the arrows;while Fig. 3 is a view in perspective of one of the parts toareduced'scale and; inverted with respect to Fig. 2.

Referring to the drawing, I have shown my invention in one-form" asapplied to a conduit or duct I and comprising a plate or diaphragmmember H which is moved by a magnet coil l2 selectively to close andopen the openings orports I3 and M on opposite sides'of the plate.

As shown; the duct I0 is provided on its end with a circular chamberformed by a circular member "l5. shown inverted in Fig. 3 and having aside wall provided with the relatively large concentric opening I 3defined by an inwardly extending flange H5; The circular chamber iscompleted by a plate member (parallel with the side wall of the memberl5'having a flanged periphery l8 which is securedon a flange l9 aroundthe periphery of'the member l5 by means of suitable screws 20', the twoflanges l8 and I9 forming an end wall for the two substantially parallelwalls l-5 andl'l. The plate I1 is provided with an inwardly extendingflange 2| which defines the re]- atively'small' opening l4, theinneroppositely disposed ends of the flanges l6 and 2| being in parallelrelation with each other, spaced apart and concentric with the circularmember l5. Also the plate H is provided with an outwardly extendingflange 22 formingan external pipe around the l'iliv opening 14 for theattachment of fluid conveying means such as a rubber hose.

For mounting purposes, the magnet coil i2 is secured in an invertedcup-like enclosure 23, the lower end of which extends downward into theopening formed by the flange It in concentric relation therewith. It issecured in position by radially extending supporting straps 26, fourbeing shown secured equally spaced apart to the cup member 23 andextending along the upper surface of the member l5 to which they aresecured by the bolts 20. Inside the member 23 in concentric relationtherewith is a tubular guide 25 for a plunger type armature 28 securedto the upper or bottom wall of the member23 by a plug member 21. At itslower end the armature is connected by a screw 28 to the center of themetal diaphragm l which is somewhat larger in diameter than the flangeit. A helical spring 23 in I the guide 25 biases the armature downwardto the position shown in which the diaphragm rests on the flange 2| andcloses the port i l. An adjustment screw 30 is provided in the plug 27to limit the upward movement of the armature when the coil I2 isenergized.

For the purpose of assuring fluid-tight seating of the diaphragm on theends of the flanges l6 and 2|, the diaphragm is provided on its sideswith layers or coatings 3| and 32 made of a resilient material.Preferably, these coatings 3i and 32 are made from a rubberlikematerial, such as neoprene,'containing a 10 per cent plasticizer. Theselayers 3| and 32 are larger in diameter than the metal diaphragm l andextend between the flanges l8 and I9 so as to serve as a sealing gasketbetween the two parts l5 and I1. The layers 3| and 32 preferably aresecured to the diaphragm II. This may be done by first cleaning thesurfaces of the diaphragm, which is preferably made of steel, with emerycloth and cleaning fluid; coating the surfaces with rubber cement,placing the layers of neoprene on the diaphragm, and then heating theassembly under pressure to 0., at which temperature it is held for flveminutes. Then the assembly is allowed to cool to room temperature withthe pressure still applied. This provides a satisfactory bond betweenthe layers 3| and 32 and the diaphragm.

Another function of the layers 3| and 32 of resilient material by reasonof the fluid tight connection between their peripheries and the end wallformed by the flanges i8 and I9 is to separate or divide the interior ofthecircular chamber formed by the parts l5 and I! into two parts orchambers, i. e., a lower 3 f part communicating with the port I, whichmay be an inlet port for oxygen, and an upper part communicating withthe port B which may be an exhalation port. Thus the flanges l8 and 2|provide a space below the diaphragm, as seen in Fig. 2, this spacecommunicating with the duct l at the Junction 33 between the member I1and the duct l0. At this point it will be observed a peripheral portionof layers 3| and 32 extends edgewise across the end of the duct I 0 toconnect the duct with both parts of the chamber. ,Also, the flange 'l 6provides a space above the diaphragm As shown, a tight-fittingmatchedjoint is provided at the point 33 between the members I5 and I1.

It will be noted that the construction of the various parts provides forthe i'reest possible flow of gas through the large opening or port l3,i. e.,

the port provided by the annular space between the cup member 23 and theflange i6. Thus it is contemplated that gas may be expelled from theduct l0 through the port l3 at very low pressure whereas the relativelysmall opening II will admit gas to the duct I 0 under a relatively highpressure. In particular, the annular space or chamber provided aroundthe flange l6 between the flange and the side wall of the member It:provides for the flow of gas from the duct ill against very littleresistance through the annular chamber to all points of the annular portI 3 which is many times larger than the port I 4.

While I have shown a particular embodiment of my invention, it will beunderstood of course that Ido not wish to be limited thereto since manymodifications may be made and I therefore contemplate by the appendedclaims to cover any atively large and small with respect to each other,

a magnet coil, supporting means for securing said magnet coil in saidlarge opening, said magnet coil being substantially smaller than saidlarge opening thereby to leave a space between it and the wall of saidlarge opening, an armature for said magnet coil, a diaphragm betweensaid parallel walls, a, connection between said diaphragm and saidarmature for movement of said diaphragm by energization of said magnetcoil to close one of said openings, means for biasing said armature toan unattracted position in which said diaphragm closes the other ofsaidopenings, and a fluid tight connection between the periphery of saiddiaphragm and said end wall so-that said diaphragm divides said chamberinto two parts with a portion of said diaphragm extending edgewiseacross said duct to connect said ductwith both parts of said chamber.

2. An electromagnetically operated valve comprising a duct provided withwalls closing one end of said duct to form a chamber including an endwall and two opposite walls provided each with an opening and saidopenings being oppositely disposed and relatively large and small withrespect to each other, a flange on each of said opposite walls aroundits opening extending toward the other wall so that the ends of saidflanges are in spaced relation with each other between said largerflange, an armature for said magnet coil, a

diaphragm between the spaced ends of said flanges, a connection betweensaid diaphragm and said armature for movement of said diaphragm byenergization of said magnet coil into engage- .ment with one of saidflanges thereby to close one of said openings, means for biasing saidarmature to an unattracted position in which said dia-,

diaphragm and said end wall so that said diaphragm divides said chamberinto two parts with a portion of said diaphragm extending edgewiseacross said duct to connect said duct with both parts of said chamber.

3. An electromagnetically operated valve comprising walls forming a ductand a chamber connected to one end or said duct, said chamber beingformed by an end wall joining walls substantially parallel with eachother provided respectively with oppositely disposed relatively largeand small openings, 2. flange on each of said substantially parallelwalls around said openings extending toward the other wall so that theends of said flanges lie in substantially parallel planes spaced apartbetween said walls, a magnet coil, means supporting said magnet coil onone of said walls with said magnet coil extending into said largeopening in concentric relation therewith,

.said magnet coil being smaller than said large biasing said armature toan unattracted position in which said plate closes one of said openings,and layers of resilient material on opposite sides of said plate securedto said plate having their edges secured to said end wall thereby todivide said chamber into two parts with peripheral portions of saidlayers extending edgewise across said duct to connect said duct withboth parts of said chamber.

4. A 1 electromagnetically operated valve comprising a duct providedwith a substantially circular portion closing one end of said duct, saidcircular portionhaving a cylindrical end wall joining substantiallyparallel walls, said parallel walls being provided each with a centralopening and said openings being relatively large and small with respectto each other, a flange on each of said parallel walls around itsopening extending toward the other parallel wall so that the ends ofsaid flanges are in spaced relation with each other between saidparallel walls, a magnet coil, supporting means including a plurality ofbrackets for securing said magnet coil to said circular portionconcentrically in said large opening, said magnet coil beingsubstantially smaller than said large opening thereby to leave asubstantially large space between it and said larger flange, a plungerarmature for said magnet coil, a diaphragm between the spaced ends ofsaid flanges, a connection between said diaphragm and said armature formovement of said diaphragm 5 by energization of said magnet coil intoengagement with said larger flange thereby to-close said large opening,spring means for biasing said armature to an unattracted' position withsaid dia- The following references are of record in the REFERENCES CITEDphragm in engagement with said smaller flange 5 me of this Patent:

UNITED STATES PATENTS thereby to close said small opening, and a fluidtight connection between the periphery of said diaphragm and said endwall whereby said diaphragm divides said circular portion into two partswith a portion of said diaphragm extending edgewise across said duct toconnect said duct with both parts ot'said circular portion.

CHESTER 1. BALL.

Name Date Hynes Nov. 6, 1917 Mears July 7, 1942 Ray. July 14, 1942

